diff --git a/src/worker/async_proxy.js b/src/worker/async_proxy.js
index ad95f091..4b904a29 100644
--- a/src/worker/async_proxy.js
+++ b/src/worker/async_proxy.js
@@ -134,6 +134,20 @@ AsyncProxy.prototype.seedRandom = async function(workerId, size) {
   this.workers[workerId].postMessage({ event:'seed-random', buf }, util.getTransferables(buf, true));
 };
 
+/**
+ * Clear key caches
+ * @async
+ */
+AsyncProxy.prototype.clearKeyCache = async function() {
+  await Promise.all(this.workers.map(worker => new Promise((resolve, reject) => {
+    const id = this.getID();
+
+    worker.postMessage({ id, event: 'clear-key-cache' });
+
+    this.tasks[id] = { resolve, reject };
+  })));
+};
+
 /**
  * Terminates the workers
  */
diff --git a/src/worker/worker.js b/src/worker/worker.js
index 44b3d96d..05815504 100644
--- a/src/worker/worker.js
+++ b/src/worker/worker.js
@@ -119,6 +119,16 @@ function getCachedKey(key) {
  * @param  {Object} options   The api function's options
  */
 function delegate(id, method, options) {
+  if (method === 'clear-key-cache') {
+    Array.from(keyCache.values()).forEach(key => {
+      if (key.isPrivate()) {
+        key.clearPrivateParams();
+      }
+    });
+    keyCache.clear();
+    response({ id, event: 'method-return' });
+    return;
+  }
   if (typeof openpgp[method] !== 'function') {
     response({ id:id, event:'method-return', err:'Unknown Worker Event' });
     return;